Subarray dimension reducing method for radar three-dimensional conformal array

Abstract

The invention belongs to the field of the radar array antenna signal processing technology and discloses a subarray dimension reducing method for a radar three-dimensional conformal array. The method can be used for various three-dimensional conformal arrays with rotation axes, wherein the various three-dimensional conformal arrays include frustum arrays, cylinder or semi-cylinder arrays, spherical arrays and the like. According to the method, firstly, subarray division is performed on the radar three-dimensional conformal array; secondly, the three-dimensional rotation transformation equation is used for adjusting the beam pointing directions of all subarrays; finally, a dimension reducing matrix is calculated. According to the subarray dimension reducing method for the radar three-dimensional conformal array, the beam pointing directions of all the subarrays can be correspondingly adjusted according to three-dimensional rotation of all the subarrays, and therefore the purpose that the beam pointing directions of the whole array face are still the same after dimension reducing is achieved.

Description

technical field [0001] The invention belongs to the technical field of radar array antenna signal processing, and relates to a subarray dimensionality reduction method for a radar stereo conformal array. This method can be used for a variety of three-dimensional conformal arrays with rotation axes, such as frustoconical arrays, cylindrical or semi-cylindrical arrays, spherical arrays, and so on. Background technique [0002] In the field of modern antenna technology, array antennas are more and more widely used in radio systems such as communication, radar, sonar, exploration, navigation, radio astronomy, and biomedical engineering. Compared with traditional antennas, array antennas have the advantages of flexible beam steering, higher signal gain, strong anti-interference ability, and high-precision spatial super-resolution ability, so they have attracted great attention. At the same time, with the rapid development of microelectronics technology, digital signal processing...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a subarray dimensionality reduction method for radar stereoscopic conformal arrays, which can solve the problem that traditional subarray dimensionality reduction techniques can only be used for linear arrays and area arrays but cannot be used for stereoscopic conformal arrays. This method can adjust the beam pointing of each sub-array according to the three-dimensional rotation, so as to ensure that the beam pointing of the entire array is still consistent after dimensionality reduction.

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